/*
 *
 * Copyright 2017 Asylo authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

#ifndef ASYLO_PLATFORM_POSIX_INCLUDE_ARPA_NAMESER_H_
#define ASYLO_PLATFORM_POSIX_INCLUDE_ARPA_NAMESER_H_

#ifdef __cplusplus
extern "C" {
#endif

/*
 * Currently defined type values for resources and queries.
 */
typedef enum __ns_type {
  ns_t_invalid = 0,   /* Cookie. */
  ns_t_a = 1,         /* Host address. */
  ns_t_ns = 2,        /* Authoritative server. */
  ns_t_md = 3,        /* Mail destination. */
  ns_t_mf = 4,        /* Mail forwarder. */
  ns_t_cname = 5,     /* Canonical name. */
  ns_t_soa = 6,       /* Start of authority zone. */
  ns_t_mb = 7,        /* Mailbox domain name. */
  ns_t_mg = 8,        /* Mail group member. */
  ns_t_mr = 9,        /* Mail rename name. */
  ns_t_null = 10,     /* Null resource record. */
  ns_t_wks = 11,      /* Well known service. */
  ns_t_ptr = 12,      /* Domain name pointer. */
  ns_t_hinfo = 13,    /* Host information. */
  ns_t_minfo = 14,    /* Mailbox information. */
  ns_t_mx = 15,       /* Mail routing information. */
  ns_t_txt = 16,      /* Text strings. */
  ns_t_rp = 17,       /* Responsible person. */
  ns_t_afsdb = 18,    /* AFS cell database. */
  ns_t_x25 = 19,      /* X_25 calling address. */
  ns_t_isdn = 20,     /* ISDN calling address. */
  ns_t_rt = 21,       /* Router. */
  ns_t_nsap = 22,     /* NSAP address. */
  ns_t_nsap_ptr = 23, /* Reverse NSAP lookup (deprecated). */
  ns_t_sig = 24,      /* Security signature. */
  ns_t_key = 25,      /* Security key. */
  ns_t_px = 26,       /* X.400 mail mapping. */
  ns_t_gpos = 27,     /* Geographical position (withdrawn). */
  ns_t_aaaa = 28,     /* Ip6 Address. */
  ns_t_loc = 29,      /* Location Information. */
  ns_t_nxt = 30,      /* Next domain (security). */
  ns_t_eid = 31,      /* Endpoint identifier. */
  ns_t_nimloc = 32,   /* Nimrod Locator. */
  ns_t_srv = 33,      /* Server Selection. */
  ns_t_atma = 34,     /* ATM Address */
  ns_t_naptr = 35,    /* Naming Authority PoinTeR */
  ns_t_kx = 36,       /* Key Exchange */
  ns_t_cert = 37,     /* Certification record */
  ns_t_a6 = 38,       /* IPv6 address (deprecated, use ns_t_aaaa) */
  ns_t_dname = 39,    /* Non-terminal DNAME (for IPv6) */
  ns_t_sink = 40,     /* Kitchen sink (experimentatl) */
  ns_t_opt = 41,      /* EDNS0 option (meta-RR) */
  ns_t_apl = 42,      /* Address prefix list (RFC3123) */
  ns_t_tkey = 249,    /* Transaction key */
  ns_t_tsig = 250,    /* Transaction signature. */
  ns_t_ixfr = 251,    /* Incremental zone transfer. */
  ns_t_axfr = 252,    /* Transfer zone of authority. */
  ns_t_mailb = 253,   /* Transfer mailbox records. */
  ns_t_maila = 254,   /* Transfer mail agent records. */
  ns_t_any = 255,     /* Wildcard match. */
  ns_t_zxfr = 256,    /* BIND-specific, nonstandard. */
  ns_t_max = 65536
} ns_type;

/*
 * Currently defined opcodes.
 */
typedef enum __ns_opcode {
  ns_o_query = 0,  /* Standard query. */
  ns_o_iquery = 1, /* Inverse query (deprecated/unsupported). */
  ns_o_status = 2, /* Name server status query (unsupported). */
                   /* Opcode 3 is undefined/reserved. */
  ns_o_notify = 4, /* Zone change notification. */
  ns_o_update = 5, /* Zone update message. */
  ns_o_max = 6
} ns_opcode;

/*
 * Currently defined response codes.
 */
typedef enum __ns_rcode {
  ns_r_noerror = 0,  /* No error occurred. */
  ns_r_formerr = 1,  /* Format error. */
  ns_r_servfail = 2, /* Server failure. */
  ns_r_nxdomain = 3, /* Name error. */
  ns_r_notimpl = 4,  /* Unimplemented. */
  ns_r_refused = 5,  /* Operation refused. */
  /* these are for BIND_UPDATE */
  ns_r_yxdomain = 6, /* Name exists */
  ns_r_yxrrset = 7,  /* RRset exists */
  ns_r_nxrrset = 8,  /* RRset does not exist */
  ns_r_notauth = 9,  /* Not authoritative for zone */
  ns_r_notzone = 10, /* Zone of record different from zone section */
  ns_r_max = 11,
  /* The following are EDNS extended rcodes */
  ns_r_badvers = 16,
  /* The following are TSIG errors */
  ns_r_badsig = 16,
  ns_r_badkey = 17,
  ns_r_badtime = 18
} ns_rcode;

/*
 * Values for class field
 */
typedef enum __ns_class {
  ns_c_invalid = 0, /* Cookie. */
  ns_c_in = 1,      /* Internet. */
  ns_c_2 = 2,       /* unallocated/unsupported. */
  ns_c_chaos = 3,   /* MIT Chaos-net. */
  ns_c_hs = 4,      /* MIT Hesiod. */
  /* Query class values which do not appear in resource records */
  ns_c_none = 254, /* for prereq. sections in update requests */
  ns_c_any = 255,  /* Wildcard match. */
  ns_c_max = 65536
} ns_class;

/*
 * Define constants based on RFC 883, RFC 1034, RFC 1035
 */
#define NS_PACKETSZ 512   /* default UDP packet size */
#define NS_MAXDNAME 1025  /* maximum domain name */
#define NS_MAXMSG 65535   /* maximum message size */
#define NS_MAXCDNAME 255  /* maximum compressed domain name */
#define NS_MAXLABEL 63    /* maximum length of domain label */
#define NS_HFIXEDSZ 12    /* #/bytes of fixed data in header */
#define NS_QFIXEDSZ 4     /* #/bytes of fixed data in query */
#define NS_RRFIXEDSZ 10   /* #/bytes of fixed data in r record */
#define NS_INT32SZ 4      /* #/bytes of data in a u_int32_t */
#define NS_INT16SZ 2      /* #/bytes of data in a u_int16_t */
#define NS_INT8SZ 1       /* #/bytes of data in a u_int8_t */
#define NS_INADDRSZ 4     /* IPv4 T_A */
#define NS_IN6ADDRSZ 16   /* IPv6 T_AAAA */
#define NS_CMPRSFLGS 0xc0 /* Flag bits indicating name compression. */
#define NS_DEFAULTPORT 53 /* For both TCP and UDP. */

// Compatibility macros.

#define T_A ns_t_a
#define T_NS ns_t_ns
#define T_MD ns_t_md
#define T_MF ns_t_mf
#define T_CNAME ns_t_cname
#define T_SOA ns_t_soa
#define T_MB ns_t_mb
#define T_MG ns_t_mg
#define T_MR ns_t_mr
#define T_NULL ns_t_null
#define T_WKS ns_t_wks
#define T_PTR ns_t_ptr
#define T_HINFO ns_t_hinfo
#define T_MINFO ns_t_minfo
#define T_MX ns_t_mx
#define T_TXT ns_t_txt
#define T_RP ns_t_rp
#define T_AFSDB ns_t_afsdb
#define T_X25 ns_t_x25
#define T_ISDN ns_t_isdn
#define T_RT ns_t_rt
#define T_NSAP ns_t_nsap
#define T_NSAP_PTR ns_t_nsap_ptr
#define T_SIG ns_t_sig
#define T_KEY ns_t_key
#define T_PX ns_t_px
#define T_GPOS ns_t_gpos
#define T_AAAA ns_t_aaaa
#define T_LOC ns_t_loc
#define T_NXT ns_t_nxt
#define T_EID ns_t_eid
#define T_NIMLOC ns_t_nimloc
#define T_SRV ns_t_srv
#define T_ATMA ns_t_atma
#define T_NAPTR ns_t_naptr
#define T_A6 ns_t_a6
#define T_DNAME ns_t_dname
#define T_TSIG ns_t_tsig
#define T_IXFR ns_t_ixfr
#define T_AXFR ns_t_axfr
#define T_MAILB ns_t_mailb
#define T_MAILA ns_t_maila
#define T_ANY ns_t_any

#define PACKETSZ NS_PACKETSZ
#define MAXDNAME NS_MAXDNAME
#define MAXCDNAME NS_MAXCDNAME
#define MAXLABEL NS_MAXLABEL
#define HFIXEDSZ NS_HFIXEDSZ
#define QFIXEDSZ NS_QFIXEDSZ
#define RRFIXEDSZ NS_RRFIXEDSZ
#define INT32SZ NS_INT32SZ
#define INT16SZ NS_INT16SZ
#define INT8SZ NS_INT8SZ
#define INADDRSZ NS_INADDRSZ
#define IN6ADDRSZ NS_IN6ADDRSZ
#define INDIR_MASK NS_CMPRSFLGS
#define NAMESERVER_PORT NS_DEFAULTPORT

#define QUERY ns_o_query
#define IQUERY ns_o_iquery
#define STATUS ns_o_status
#define NS_NOTIFY_OP ns_o_notify
#define NS_UPDATE_OP ns_o_update

#define NOERROR ns_r_noerror
#define FORMERR ns_r_formerr
#define SERVFAIL ns_r_servfail
#define NXDOMAIN ns_r_nxdomain
#define NOTIMP ns_r_notimpl
#define REFUSED ns_r_refused
#define YXDOMAIN ns_r_yxdomain
#define YXRRSET ns_r_yxrrset
#define NXRRSET ns_r_nxrrset
#define NOTAUTH ns_r_notauth
#define NOTZONE ns_r_notzone

#define C_IN ns_c_in
#define C_CHAOS ns_c_chaos
#define C_HS ns_c_hs
#define C_NONE ns_c_none
#define C_ANY ns_c_any

#define DELETE ns_uop_delete
#define ADD ns_uop_add

#ifdef __cplusplus
}  // extern "C"
#endif

#endif  // ASYLO_PLATFORM_POSIX_INCLUDE_ARPA_NAMESER_H_
